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Requirements & Capacity

functional requirements non-functional requirements traffic estimation storage estimation bandwidth estimation latency budget availability target read/write ratio

Scaling & Distribution

vertical scaling horizontal scaling load balancing consistent hashing stateless services service discovery partitioning/sharding replication

Caching & Data

cache-aside write-through cache write-back cache cache invalidation database indexing read replicas CQRS event sourcing

Messaging & Async

message queue publish-subscribe dead-letter queue retry with backoff idempotent consumer outbox pattern stream processing saga orchestration

Reliability

health checks circuit breaker bulkhead isolation timeouts rate limiting graceful degradation multi-region failover disaster recovery RPO/RTO

Interfaces & Observability

API gateway service-to-service authentication distributed tracing structured logging metrics and SLOs correlation IDs backpressure schema evolution

System Design / Reliability

multi-region failover

Learn multi-region failover in System Design with a dedicated explanation, a concept-specific example, practical cautions, and a mastery check.

12 min read • Advanced

system-design-039.yaml

yaml

regions:
  primary: ap-south-1
  standby: ap-southeast-1
traffic_manager: health_based_dns
failover: promote_standby_then_shift_dns

What to watch

Content source & attribution

Original Syntaxis Content · Original Syntaxis Content

Lesson quizzes

multi-region failover Mastery Check →

graceful degradation

disaster recovery RPO/RTO